State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials, Sun Yat-Sen University
Yanming Zhu
State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials, Sun Yat-Sen University
Liang Chen
State Key Laboratory of Intense Pulsed Radiation Simulation and Effect and Radiation Detection Research Center, Northwest Institute of Nuclear Technology
Wei Zheng
State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials, Sun Yat-Sen University
Mengxuan Xu
School of Nuclear Science and Technology, Xi’an Jiaotong University
Jinlu Ruan
State Key Laboratory of Intense Pulsed Radiation Simulation and Effect and Radiation Detection Research Center, Northwest Institute of Nuclear Technology
Renfu Li
CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research On the Structure of Matter, Chinese Academy of Sciences
Titao Li
State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials, Sun Yat-Sen University
Zhuogeng Lin
State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials, Sun Yat-Sen University
Lu Cheng
State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials, Sun Yat-Sen University
Ying Ding
State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials, Sun Yat-Sen University
Feng Huang
State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials, Sun Yat-Sen University
Xiaoping Ouyang
State Key Laboratory of Intense Pulsed Radiation Simulation and Effect and Radiation Detection Research Center, Northwest Institute of Nuclear Technology
Abstract Large-size scintillators with high efficiency and ultrafast radiation fluorescence have shown more potential in the applications to ionizing radiation detection of medical diagnosis, nuclear control and high-energy physics. Currently, although traditional scintillators have made tremendous progress in scintillation efficiency, there are still challenges left in fluorescence lifetime. Faced with that problem, we adopted 2-inch ZnO as the substrate and doped gallium as activator to realize an ultrafast fluorescence excited by α-ray, of which the decay time is only 600 ps that is the shortest scintillation decay time reported so far. The results show that the shallow donor related with gallium not only effectively suppresses band-edge self-absorption, but makes ultrafast radiation possible, which gets gallium-doped ZnO as a potential scintillator for high-quality ultrafast dynamic imaging proved.
